Presser-foot for irregular molders.



No. 882.777. PATENTED MAR. 24, 190.8. J. 0. EURO-HILL. PRESSER FOOT FOR IRREGULAR MOLDE-RS.

APPLICATION FILED DEC. 5. 1907.

UNITED STATES PATENT OFFICE.

JOHN C. BURGHILL, OF JAMAICA PLAIN, MASSACHUSETTS.

PRESSER-FOOT FOR IRREGULAR MOLDERS.

presser foot which shall hold the work down as it is being guided by any suitable guide along the bed of the machine to'the cutter and which shall form a guard to prevent the operator from injuring his hands by contact with the cutters of the machine.

The object of the invention is further to provide a device of the character set forth which may be used either on a single or double machine and changed from one cutter to the other, and further the object of the invention is to provide a device of the character set forth which may be readily thrown out of working position Without changing any of the relative adjustments of the parts, so that the operator can get at the cutter to adjust or change the same with very little loss of time.

It is still further the object of the invention to provide a device of the character set forth which can be adjusted to press upon the work to any desired extent and which is held firmly and positively against the work without the aid of springs or other devices which, by yielding, or weakening cause the device to become insecure.

The invention consists in the combination and arrangement of parts set forth in the foling specification and particularly pointed out in the claims thereof.

Referring to the drawings: Figure 1 is a perspective view of my improved presser foot, showing the same in connection with a portion of the table of an irregular molder, said table being broken away to save space in the drawings, a portion of the presser foot arm also being shown in dotted lines in its vertical positionthat is, in the position in which it is placed when the operator desires to adjust or change the cutters. Fig. 2 is a plan View of the same, showing the presser foot and two cutter heads, the presser foot being shown in full lines in position to be used with one of the cutter heads and in Specification of Letters Patent.

Application filed December 5, 1907.

Patented March 24, 1908.

Serial No. 405,150.

dotted lines in position to be used with the other of said cutter heads, one of the arms of said presser foot being broken away for the sake of illustration. Fig. 3 is a section taken on line 3-3 of Fig. 2.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5 is the table of an irregular molding machine, 6 is a hole therein through which the cutter projects, and 7 is the spindle upon which the cutter is fastened. 8 is a standard projecting vertically V upward from the table 5 and 9 a bracket which is fastened to the standard 8 by a setscrew 10, so that said bracket can be raised or lowered bodily upon the standard 8 or can be rotated thereon to bring the presser foot into operative relation relatively to the cutter head 11 or the cutter head 12, as may be desired.

The bracket 9 has an arm 13 extending from the standard 8 in one direction and another arm 14 extending in the opposite di rection. The arm 14 is grooved along its opposite upper edges at 15 and 16. A bolt 17 extends horizontally through the arm 13 and constitutes a pivot for the presser arm 18.

The presser arm 18 consists of two parts 19 and 20 which are slotted at 21 and 22, respectively, to receive the bolt 17 and to allow the presser arm, as a whole, to be adjusted longitudinally thereof relatively to the cutter head. The parts 19 and 20 are curved outwardly at 23 and 24 to extend out around the cutter head 11 and to form guards to prevent the operator coming in contact with said cutter head, and extending still farther beyond the cutter head said parts of the presser arm are clamped together by a bolt 25 and thumb-nut 26. Said arms when clamped together also clamp between them a presser block 27, which consists of a stem 28 and a plate 29.

The presser foot, as a whole, consists of the bracket 9, the presser arm 18 and the presser block 27. wardly, with the parts 19 and 20 in the grooves 15 and 16 of the arm 14, by a clamp bolt 30 (Fig. 3), thumb-nut 31 and clampplate 32. The clamp-bolt 30 extends vertically through the arm 14 and serves to press the parts 19 and 20 downwardly into the grooves 15 and 16 and to hold them firmly in position while the work is passing through the machine and being operated upon by the The presser arm is held downcutters, during which time the presser foot is resting upon said work and preferably press.

ing slightly downward thereon.

The general operation of the device hereinbefore specifically described is as follows: The work is guided laterally along the bed 5 of the machine by suitable guides (not shown in the drawings), said guides holding the same laterally in proper relation to the cut ters 11 or 12. The presser foot hereinbefore described keeps the work firmly pressed down against the bed of the machine and projecting outwardly, as it does at 23 and 24, together with the presser plate 29, which may be made of any desirable formor length, the operator is prevented from being injured by the cutters. The plate 29 is held downwardly against the work by the arm 18 which may be forced downwardly to bring more or less pressure directly upon the work through the presser block by tightening the thumb-nut 31 which presses the clamp-plate 32 against the parts 19 and 20 of the presser arm 18 and forces said presser arm downwardly, together with the stem 28 and plate 29' of the presser block 27.

By adjusting the stem 28 upwardly or downwardly between the parts 19 and 20 and clamping the same in position, when properly adjusted the plate 29 may be brought to any desired position relatively to the work upon which it rests or is pressed for difierent thicknesses of work or for different degrees of pressure which it is desired to obtain upon the surface of the work which is being manipulated by the cutters.

If it is desired to adjust the presser arm bodily longitudinally thereof relatively to the cutters, the nut 17 upon the bolt 17 is loosened and the parts 19 and 20 moved on said bolt which slides in the slots 21 and 22, respectively, to allow of this adjustment. When the arm has been adjusted to the desired position, the bolt is tightened by screwing up on the thumb-nut 17.

If it is desired, the presser arm may be laced in a substantially vertical position, as indicated by dotted lines (Fig. 1), by loosening the thumb-nut 17 and tipping the arm upwardly to the position indicated in dotted lines (Fig. 1) from the position shown in full lines in said figure and until the parts 19 and 20 rest against the shoulders 33 and 34 which are formed upon the arm 13 of the bracket 9.

When it is desired to change the presser arm so that the presser block may be used in connection with the cutter head 12, instead of being used in connection with the cutter head 11, the set-screw 10 is loosened, the presser arm is tipped upwardly upon its pivot to clear the cutter head 1 1, the bracket 9 is then rotated on the standard 8, and the presser arm is then dropped into position in the location relatively to the cutter 12 indicated in dotted lines (Fig. 2). The setmaterial.

' tween the parts 19 and 20 instead of at right angles thereto, as shown in Fig. 1.

t will be understood that in setting the presser so that the presser plate 29 may be pressed with the desired force a ainst the material to be operated upon, the thumb-nut 26 is loosened and the presser plate 29 is then set down against the upper surface of the The thumb-nut 31 is then slightly loosened, the arms 19 and 20 are raised until the upper surfaces of said arms press against the under side of the clamp-plate 32. The thumb-nut 26 is then tightened, rigidly fastening the stem 28 and plate 29 to the arm 18, and then to bring a slight pressure to bear upon the surface of the wood by the plate 29 the thumb-nut 31 is tightened slightly, it being understood that the under surfaces of the arms 19 and 20 at this time do not bottom in the grooves 15 and 16.

While there is no spring included in the construction of my improved presser foot and thus the insecurity and unreliability of a spring is done away with, the two parts forming the presser foot arm are so constructed that they will yield and spring slightly, thus imparting sufiicient resiliency to the presser foot, as a whole, to allow the presser block to bear against the surface of the material which is being operated upon with a constant pressure, and this resiliency of the arm allows the presser block to rise and fall slightly during the operation of the machine, so that any slight variation in thickness of the piece being operated upon will not prevent the same from being fed to the cutters.

Having thus described my invention, what I claim and desire by Letters Patent to secure is:

1. A presser foot for wood working machines comprising in its construction a bracket adapted to be fastened to a standard, a horizontal pivot on said bracket, a presser arm pivoted thereto and adjustable longitudinally thereon, and a presser block fast to said presser arm.

2. A presser foot for wood working machines comprising in its construction a bracket adapted to be fastened to a standard, a horizontal bolt constituting a pivot fast to said bracket, a presser arm in two parts pivoted to and fastened together by said bolt, a resser block, and a clamp-bolt adapted to 0 amp said presser block between said parts.

3. A presser foot for wood working machines comprising in its construction a bracket adapted to be fastened to a standard, a horizontal pivot on said bracket, a presser arm pivoted thereto, and a presser block fast to said presser arm, said bracket having a shoulder thereon forming a stop against which said arm may rest when in a substantially vertical position.

4. A presser foot for wood working machines comprising in its, construction a bracket adapted to be fastened to a standard, a horizontal pivot on said bracket, a presser arm pivoted thereto, a presser block fast to said presser arm, a horizontally extending arm on said bracket, a clamp-plate,

and a bolt on said bracket arm, whereby said presser block is pressed against the work.

5. In a wood working machine, a vertical standard, a bracket rotatably mounted on said standard and adjustable longitudinally thereof, a horizontal pivot on said bracket, a presser arm mounted on said pivot, and a presser block fast to said presser arm.

6. In a wood working machine, a vertical standard, a bracket rotatably mounted upon said standard and adjustable longitudinally thereof, a horizontal bolt constituting a pivot fast to said bracket, a presser arm in two parts pivoted to and fastened together by said bolt, a presser block, a clamp-bolt adapted to clamp said presser block between said parts and tofasten said parts together, said bracket having a shoulder thereon against which said arm may rest when in a substantially vertical position,-and a longitudinally extending arm on said bracket, a clamp-plate and a bolt adapted to clamp said presser arm to said bracket arm, whereby said presser foot is pressed against the work.

7. A presser foot for wood working machines comprising in its construction a bracket adapted to be fastened to a standard, a horizontal bolt constituting a pivot fast to said bracket, a presser arm in two parts pivoted to and fastened together by said bolt, said parts curved outwardly in opposite directions, respectively, adjacent to their outer ends to form a guard, a presser block, and a clamp-bolt adapted to clamp said presser block between said parts.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN C. BURCHILL. Witnesses:

CHARLES S. GooDING, LoUIs A. JoNEs. 

